Textile roll



C. K. DUNLAP Feb. 9, 1937.

TEXTILE ROLL Filed June 4, 1935 Patented Feb. 9, 1937 UNITED STAES TEXTILE ROLL Application June 4, 1935, Serial No. 24,945

1 Claim.

The present invention relates to textile rolls and particularly to drawing rolls utilized for elongating, evening, and reducing fibrous material in the process of preparing such material for spinning or twisting operations whereby it is formed into yarn or thread.

Textile rolls of this general type are used in large numbers in the textile industry and have heretofore generally been fabricated by placing upon metallic cores covering layers of cloth, leather, cork, or other materials. A textile roll now favored greatly by the industry comprises the usual metal core and a cylindrical cover of artificial cork, artificial cork having been found to have the desirable features of durability, evenness of surface, and elasticity and being at the same time comparatively inexpensive.

One form of cork cover for textile rolls is disclosed in the W. A. Carpenter Patent No. 1,730,357, the cover comprising essentially an outer layer of cork and an inner layer of fabric whereby the strength of the cover in tension is increased. Roll covers of cork may be subjected, if desired, to grinding operations in order that the surfaces thereof may be rendered truly cylindrical, but it is not possible to polish the surfaces of the cork covers by any known means owing to the nature of the cork itself. Thus, while it is desirable that the annular end surfaces of the cork covers for textile rolls be smooth, in order that these surfaces may not catch thread or yarn, no means for satisfactorily effecting smoothing of them has been perfected.

In accordance with the present invention, however, I provide a textile roll cover of cork having smooth annular end surfaces by coating the natural surfaces of the cork with a coating material, such as lacquer, the lacquer coated end surfaces being, when the lacquer has fully dried, quite smooth, even resembling highly polished surfaces. The lacquer coating, furthermore, serves to prevent the penetration of moisture into the ends of the cover and to cause these ends to swell or become enlarged to a greater extent than the central portion of the cover which of course would prevent the. central portion of the cover from firmly contacting with the cooperating drawing roll with the result that the efficiency of the pair of rolls in drawing thread or yarn is reduced.

It is appreciated by all skilled in the art that the atmosphere existing in textile establishments is maintained highly humid. So long as the cylindrical thread engaging surface of the cork cover alone is subjected to the humid atmosphere dametrical expansion or contraction of the cover is uniform along the length of the cover and hence does not have the effect of destroying or modifying the true cylindrical working surface of the roll. If, however, the end surfaces of the cover, as well as the cylindrical working face, are exposed to the moist atmosphere, the probability of unequal diametrical expansion or contraction of the cork along the length of the cover is increased.

Again, where artificial cork is used in the fabrication of cork covers, and especially where the covers are formed of highly compressed artificial cork and in such manner that the flattened cork grains are disposed edgewise to the working surfaces of the roll covers, there is a tendency for grains of cork to flake off from the ends of the cover formed of this material. Where the grains are disposed edgewise to the working surface, it of course follows that their flattened faces will be exposed at the ends of the cover and will more readily separate from the body of the cover than When other kinds of cork are employed. By covering the ends of the cover with lacquer or other coating material disintegration of the. ends due to flaking off of individual grains of cork is prevented.

In the accompanying drawing, two views of a textile roll cover embodying the invention are set forth.

In the drawing:

Figure 1 illustrates the roll cover in perspective; and

Figure 2 in side elevation, partly broken away.

While I may form the cover illustrated in various ways, I prefer to form the same in two concentric layers, an inner layer ii) of cloth and an outer layer H of artificial cork. The cover is fabricated by first winding a strip of cloth spirally upon a mandrel and thereafter spirally winding upon the cloth cylinder thus formed a strip of artificial cork, the artificial cork strip being wound spirally but in a direction reversed to that in which the cloth strip was previously wound, so that the joints of the cloth and cork strips cross, thus making a stronger cylinder. A suitable adhesive is utilized to secure the cork to the fabric and by preference the cork strip used is of the type in which the edges of the flattened grains of cork are disposed at angles to the outer surface of the resulting cylinder.

The elongated cylinder thus produced is then out into short sections, one of which is illustrated in the drawing and preferably the ends of each section are bevelled, as shown. Thereafter, these annular bevelled end surfaces are coated with a coating substance such as a suitable paint, enamel or lacquer, as indicated at I2 in the drawing, the coating material completely covering the end surfaces but not extending on to the cylindrical working surface. In the event that the coating is applied by dipping the ends of the cover in a body of coating material, the inner surface of the inner fabric layer 10 will likewise be coated for short distances at the ends thereof, as indicated in the drawing. If the coating materialis applied otherwise than by dipping, the inner surface of the fabric layer may not be coated at any portion thereof. It will be appreciated that the coating may be applied in any desired manner.

When the coating is dried, the completed roll cover has the advantages above set forth, the end surfaces being entirely smooth and having the nature of polished surfaces, moisture being excluded at the ends and swelling and flaking at the ends prevented. The resulting cover, therefore, is superior to similar covers heretofore designed and suggested in these respects.

Having thus described the invention, what is claimed as new and desired to be secured by the roll being completely covered by closely adhering, hard, smooth coatings of a lacquer-like material, such coatings preventing the catching of yarn or thread upon said end surfaces, and preventing the penetration of moisture and the flaking off of cork granules.

CHARLES K. DUNLAP.

natural cork, and the annular end surfaces of 

